______forms a natural boundary between Mexico and the United Sta
分类: 英语国家概况(00522)发布时间: 2024-08-22 07:05浏览量: 0
______forms a natural boundary between Mexico and the United States. A、The Colorado River B、The Columbia River C、The Mississippi River D、The Rio Grande River 【正确答案】：D 【题目解析】：里奥格兰德河成为墨西哥和美国之间的天然国界线。